Placement Method of Aerial Fiber Optic Cable

There are currently two methods of placing overhead fiber optic cables: one is the fixed pulley Traction method, including artificial traction method and mechanical traction method; the other is the cable disk mobile release method.

A fixed pulley traction method
Shelf hanging fiber optic cable, the first set up to be put on the fiber optic cable disk, in the lead on and lead off the two poles fixed on the release of the cable with a large pulley. Each pole file in the hanging line, every 10 ~ 20m hang a small pulley (guide pulley), and will be worn into the small pulley traction rope. Then, make a good traction head, and connect the traction rope with the fiber optic cable, ready for deployment.

When using manual traction, manually push the fiber optic cable disk gradually release the fiber optic cable, and then every other pole to set a person on the pole for auxiliary traction (if necessary, in the corner of the pole is equipped with a guide pulley). Gradually tighten the traction rope at the traction end, so that the fiber optic cable is slowly released. In order to fully guarantee the safety of optical fiber, cable lines in the cable end, cable end and cable traction head, should be set up 3 contact phone, and always keep contact smooth. When the single disk cable is long, generally divided into two releases: that is, after the release of the first half of the disk, the inverted on the spot, "8" word, and then to the other direction of the release of the second half of the disk.

When using mechanical traction, the mechanical traction host should be placed at the cable collection end, and the auxiliary traction machine should be placed at the appropriate position of the erection route. At the cable release end, set up the fiber optic cable tray to be released, and manually push the fiber optic cable tray so that the fiber optic cable is gradually released from the top of the tray, so as to replace the manual traction with the mechanical one, and achieve the purpose of laying and releasing the fiber optic cable. In the traction end production, must ensure that the Traction force Mainly on the reinforcing parts of the fiber optic cable. Under the limitation of the permissible traction force of the fiber optic cable, the length of the fiber optic cable to be deployed at one time should depend on the terrain conditions. In addition, the traction speed of the fiber optic cable traction machine should be determined in advance. When the traction tension exceeds the standard, there should be an automatic cut-off or warning device.

After the fiber optic cable is placed, the length of fiber optic cable required for the joints and the length of fiber optic cable reserved for each pole should be reserved. Finally, the remaining cable with wrapped ends is hung on the pole.

Placement of hanging overhead fiber optic cable, can be appropriate in the pole to do expansion and contraction bend, in the medium load area, heavy load area, super-heavy load area, the general requirements of each pole are reserved; in the light load area, every 3 to 5 poles to do a reservation; for ice-free areas, you can not do the reservation (but the deployment of fiber optic cable can not be stretched too tight, pay attention to the natural verticality ). The specifications of the expansion bend of the fiber optic cable on the pole as shown in Figure 1, the center of the pole should be used to protect the center part of the polyethylene bellows, the length of the reservation is 2m (generally not less than 1.5m). Reserve both sides and tying parts, should pay attention to can not be bundled, so that in the temperature change can be free to expand and contraction, play a role in protecting the fiber optic cable. Fiber optic cable by the "ten" hanging line or "d" hanging line, should also be installed to protect the pipe.

Fixing and hanging of overhead fiber optic cables, generally using hooks. Fiber optic cable hook spacing is 50 cm, the allowable deviation should not be less than ± 3 cm. Hooks in the hanging line of the buckle direction should be consistent, hooks should be complete tray, there shall be no mechanical damage. The first hook on both sides of the pole should be 25 cm away from the cable clamp, and the allowable deviation should not be more than ± 2 cm.

                  Steel Sheet Hoop                                                                              Stainless Steel Hook                                                         Fiber Cable Storage Bracket

The fiber optic cable disk mobile release method
This rack hanging method is to put the optical disk on the truck (one end of the cable will be fixed in the pole hanging line), manually push the optical disk, so that the optical cable along the overhead pole road release, while the cable hanging on the hanging line. In a pole distance after the release, the cable can be fixed in the hanging line, start the next pole distance of the release. This deployment method is simple to operate, but the use of trucks set up by the limitations of the conditions. When using this method, the following conditions should generally be met.

1.The width of the road allows vehicles to travel.
2.The distance of the overhead pole road from the roadside is not more than 3 m.
3.There is no obstacle in the overhead section.
4.The suspension line is located at the lowest level of other lines on the pole road.

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